Low cost resuscitator



Aug. 19, 1969 A. F. CHQUINARD ETAL LOW COST RESUSCITATOR Filed 'my ze, 196e United States Patent O 3,461,865 LOW COST RESUSCITATOR Alfred F. Chouinard, Chicago, and Allan E. Beeler, Bensenville, Ill., assignors to Chemetron Corporation, Chicago, lll., a corporation of Delaware Filed July 28, 1966, Ser. No. 568,446 Int. Cl. A6211 7 /00 U.S. Cl. 12S-145.7 7 Claims ABSTRACT OF THE DISCLOSURE Apparatus having a face piece connected to telescoping tubular sections which force air under pressure into the face piece when the tubular sections are telescoped to a lesser extent. Valve means between the face piece and the telescoping sections expose exhaust ports to the atmosphere when the tubular sections are telescoped to a greater extent.

This invention relates to a low cost resuscitator useful in resuscitating a patient by forcing air into his lungs.

It is a primary purpose of the invention to provide a low cost resuscitator having a pair of tubes or tubular sections disposed in huid-tight, sliding, telecoping relation with respect to each other, the ends of the tubular sections being closed off by end plates. The tubular sections can be constructed of low cost materials such as paperboard which may be impregnated with a suitable material such as a resin or wax, plastics, composites including laminated structures such as a layer of foil and a layer of paperboard or plastic, `or thin metal. A face piece, connected to one of the end plates, is adapted to be placed against the face of the patient, preferably about his nose and mouth. When the tubular sections are moved relative to each other to be telescoped to a lesser extent, air under pressure is forced through a check valve, into the face piece and into the patients lungs. A valve is preferably provided between the check valve and the face piece to vent gaseous fluid expelled by the patient to the atmosphere; this valve is preferably a slide valve, and opens when the tubular sections are moved relative to each other to be telescoped to a greater extent.

In the drawings:

FIGURE 1 is an elevational view, partly in section, of a low cost resusctator in accordance with the invention, showing a slide valve in one position;

FIGURE 2 is an enlarged, broken away, sectional view of the resuscitator shown in FIGURE 1, but showing the slide valve in another position;

FIGURE 3 is a sectional view taken along line 3-3 of FIGURE 2; and

FIGURE 4 is a fragmentary view showing an alternative construction or the resuscitator.

Referring now to the embodiment of FIGURES 1 through 3 of the drawings, there is shown a resuscitator generally indicated at 10, having a body section 11 connected to a face piece 12. The resuscitator includes a pair of tubes or tubular sections 13 and 14 shown to be in sliding, lfluid-tight, and telescoping relation with respect to each other. The tubular section 13 has an end plate 15, while the tube 14 has an end plate 16. The end plate 15 has a crimped flange 17 which embraces the end of the tubular section 13, and the end plate 16 has a crimped flange 18 which embraces the end of the tube 14. The end plate 16 has a pressure relief valve 1-9 having a spring loaded movable valve element 20 shown to be seated against a seat 21 in FIGURE l. When the tubular section 14 is moved relative to the tubular section 13 to cause the air pressure in chamber 22 to exceed a preselected level the movable valve element 20 is unseated until the air pressure in the chamber 22 falls to the pre- "ice 23 by which air can enter the chamber 22 when the tubular sections 13 and 14 are extended relative to each other. This causes vacuum yor subatmospheric pressure to exist in the chamber 22 and hence a flexible ap element 24 is caused to be held away from the ports 23. A washer 25 and a clip 26 hold the inner marginal portion of the flap 24 against the end plate 16.

A disc 30 of a check valve generally indicated at 27 is shown to be held in position in the tubular section 13 between the ends of short tubes 28 and 29. The disc 30 has ports 31. A Washer 32 holds the inner marginal portion of a flexible ap valve element 33 against the disc 30. Pressure in the chamber 22 will cause the valve elements 33 to move away from the ports 31, thus enabling air under pressure to pass into the face piece 12. A valve generally indicated at 34 and shown to take the form of a slide valve having a movable valve element 35 connected by a flanged connector 36 to the face piece 12 and a stationary valve element 37 connected to the end plate 15. The end plate 15 has an opening 38 in which the valve element 37 is received. The valve element 37 takes the form of a ring of generally U-shaped crosssection. The valve element 35 has a plurality of ports 39, which in the position shown in FIGURE 1 are closed olf and which in the position shown in FIGURE 2 permit communication from the inside of the face piece 12 to the atmosphere. Movement of the valve element 35 with respect to the valve element 37 is limited by a retainer in the form of a wire 40 the ends of which project through opposed apertures 41 and 42 in the valve element 35. A short tube 43 which encircles and is adhesively secured to the tube 13 serves to reinforce the end of the tubular section 13 and to provide a stop for a tube 14.

In the embodiment of FIGURE 4 the tubes 28 and 29 are omitted and a check valve 27a connected directly to the valve 34a, replaces the check valve 27. Valve element 35a has an outturned ilange 44 to which the check valve 27a is secured. In all other respects the elements of the resuscitator shown in FIGURE 4 are the same as in the embodiment of FIGURES l through 3 and hence the same reference characters are employed.

In using the resuscitator 10 and assuming that the tubular sections 13 and 14 are in extended positions relative to each other and that the face piece 12 is suitably positioned against the face of a patient, upon moving the section 14 into a less extended position, that is, toward the face piece 12, air pressure is built up within the chamber 22, thereby forcing air under pressure through ports 31 of the check valve 27 and into the face piece 12. Force exerted against the tube 14 by the user will insure that the valve 34 is in the position indicated in FIGURE l. Movement of the tubular section 14 in one direction is limited upon abutment with the tube 43. To permit the patient to expel gaseous fluid from his lungs the tube 14 is moved into extended position relative to the tubular section 13, for example by pulling at strap handle 45 adhesively secured at opposed locations to the upper end of the tubular section 14. As the users hand holds the face piece 12 against the patients face while the user is pulling on the strap handle 45 the valve 34 assumes the position shown in FIGURE 2 because the valve element 35 has shifted relative to the valve element 37. As soon as the ports 39 are uncovered the patient can expell gaseous fluid through the face -piece 12 and the ports 39 to the atmosphere. While the tubular section 14 is moved into extended position relative to the tubular section 13 air is admitted through the port 23 into the chamber 22. To limit movement and prevent overextension of the tubular sections 13 and 14 there is provided a flexible connector 46 disposed in the chamber 22 and secured, as for example by stitching, at spaced apart locations to tubular sections 13 and 14. In resuscitation of a patient, the tube is rhythmically and repeatedly reciprocated. A seal assembly generally indicated at 47 can be employed, if desired. The seal assembly 47 includes a continuous circular ring 48 having an external groove 49 which receives a continuous annular seal 50 composed for example of a suitable exible resilient seal material. The outer periphery of the ring 48 is spaced from the tubular section 14 to provide clearance. The ring includes a depending skirt 51 which ts against the upper inner marginal surface of the tubular section 13. The skirt 51 is adhesively secured to the tubular section.

While the tube 14 is shown to be disposed about the tubular section, the tubular section 14 can as well as slidably movable in fluid-tight telescoping relation with the inside of the tubular section 13. If desired the end plate 16 and the pressure relief valve 19 which it carries can be suitably mounted at the other end of the tube 14 provided that the tube 14 is slidable inside the tube 13. One, and preferably both, the valve elements 35 and 37 are composed of flexible resilient material such as polyethylene, polypropylene, styrene or the like. Assuming that only one of the valve elements 35 and 37 is to be composed of exible resilient material, it is preferred that the valve element 37 be constructed of such material.

We claim:

1. Apparatus for resuscitating a patient, comprising: a body section including a first tubular section having an end wall, and a second tubular section disposed in fluid-tight, slidable, and telescoping relation with respect to said rst tubular section, said second tubular section having an end wall opposite said Wall of said first tubular section, said body section providing a chamber, a valve connected to one of said end Walls operable to admit air from the atmosphere into the chamber as the tubular sections are telescoped to a greater extent and to close the chamber from the atmosphere for providing air under pressure as the tubular sections are telescoped to a lesser extent, a face piece connected to one of said end walls, a check valve between said chamber and said face piece when said first and second sections are slid relative to each other to force air into the lungs of the patient, said body section having means for limiting the amount of air pressure in said chamber to a preselected level, and valve means connected to the face piece and slidingly mounted through the one end wall for movement into the body section as the tubular sections are moved relative to each other to be telescoped to a lesser extent providing for passage of the air from the chamber into the face piece said valve means having at least one port movable from a covered position inside of the body section when the valve means is inside the body section to a position exposed to the atmosphere outside the body section when the tubular sections are telescoped to a greater extent providing for passage of gas expelled by the patient through said face piece and valve means and from the port to the atmosphere.

2. Apparatus as claimed in claim 1, wherein said tubular sections are composed of paperboard material.

3. Apparatus as claimed in claim 1, wherein said check valve is mounted in said body section spaced from said valve means.

4. Apparatus las claimed in claim 1, wherein said valve means includes a first valve element and a second valve element, one of said first and second valve elements including the port.

5. Apparatus as claimed in claim 4, wherein at least one of said first and second valve elements is composed of exible resilient material.

6. Apparatus as claimed in claim 4, wherein said check valve is secured to one of said first and second valve elements.

7. Apparatus as claimed in claim 4, including seal means between said first and second tubular sections.

References Cited UNITED STATES PATENTS 1,368,254 2/1921 Habberley 12S-145.7 2,399,643 5/ 1946 Kreiselman 12S-145.7 2,823,667 2/1958 Raiche 12S-145.7 3,105,488 10/1963 Richards 12S-145.7 3,124,124 3/1964 Cross 12S-145.5 3,125,094 3/1964 Krug 128-300 3,316,903 5/1967 Richards 12S- 145.7

CHARLES F. ROSENBAUM, Primary Examiner 

